Help to write the Monitor script

have you started with something we could help with or expect a full solution here?

Try using Regex in Monitor: SOL5917

A full solution will be proffered, as I am new to the coding world. many thanks

I would appreciate if a full solution or a steps involved can be described a bit in detail please.

Will you clarify if the content of the response containing the "OK" string is returned in a single or multiple lines?

thanks for looking into this, actually on the webpage it displays the response in 2 lines as text, nothing special..and another thing would there be much difference because the url is HTTPS and not HTTP. Regards

this shows pretty well how to go about it

 

https://devcentral.f5.com/s/articles/ltm-external-monitors-the-basics

 

This one should do it:

!/bin/sh
 these arguments supplied automatically for all external pingers:
 $1 = IP (::ffff:nnn.nnn.nnn.nnn notation or hostname)
 $2 = port (decimal, host byte order)
 $3 and higher = additional arguments

 $MONITOR_NAME = name of the monitor

 In this sample script, $3 is the regular expression


 Name of the pidfile
pidfile="/var/run/$MONITOR_NAME.$1..$2.pid"

 Send signal to the process group to kill our former self and any children
 as external monitors are run with SIGHUP blocked
if [ -f $pidfile ]
then
   kill -9 -`cat $pidfile` > /dev/null 2>&1
fi

echo "$$" > $pidfile

 Remove the IPv6/IPv4 compatibility prefix
node_ip=`echo $1 | sed 's/::ffff://'`

 Using the nc utility to get data from the server.
 Search the data received for the expected expression.

count=$(echo -en "GET / HTTP/1.0\n\n\n\n" | nc $node_ip $2 2>/dev/null | egrep -v '200 OK' 2>/dev/null | tr -d -c 'OK' 2>/dev/null | awk '{ print length; }' 2>/dev/null)

if [ ! -z "$count" ]
then
    count=$(($count+0))
    if [ $count -gt 8 ]
    then
     Remove the pidfile before the script echoes anything to stdout and is killed by bigd
    rm -f $pidfile
    echo "up"
    fi
fi

 Remove the pidfile before the script ends
rm -f $pidfile

 END.

You need to modify it to put in the URI specific for your application.

Edit: The count should be 8 or greater.

OK you can use a standard monitor, which is preferred over an external monitor, and use the following as the receive string:

:\"OK\".*:\"OK\".*:\"OK\".*:\"OK\"

.